A New Amino Acid Substitution at G150S in Lanosterol 14-α Demethylase (Erg11 protein) in Multi-azole-resistant <I>Trichosporon asahii</I>
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منابع مشابه
Expression of Lanosterol 14-Demethylase (ERG11) Gene of Three-Drug Combinations in Candida albicans
Patients with impaired immunity are at particular risk of infections with Candida albicans. Antifungal drugs such as azoles commonly used for candidiasis treatment, but drug resistance is one of the most common problems for public health. The aim of this study was to evaluate the expression of lanosterol 14-demethylase (ERG11) gene for three-drug combinations in C. albicans. Disk diffusion and ...
متن کاملMultiple regulatory elements control expression of the gene encoding the Saccharomyces cerevisiae cytochrome P450, lanosterol 14 alpha-demethylase (ERG11).
The major cytochrome P450 in the yeast Saccharomyces cerevisiae, lanosterol 14 alpha-demethylase (ERG11), catalyzes an essential reaction in the biosynthesis of ergosterol, the predominant sterol of yeast. Protein levels of this cytochrome P450 are known to be affected by carbon source, oxygen, and heme, as well as the growth state of the culture. We have determined that ERG11 message levels in...
متن کاملThe presence of an R467K amino acid substitution and loss of allelic variation correlate with an azole-resistant lanosterol 14alpha demethylase in Candida albicans.
Azole resistance in the pathogenic yeast Candida albicans is an emerging problem in the human immunodeficiency virus (HIV)-infected population. The target enzyme of the azole drugs is lanosterol 14alpha demethylase (Erg16p), a cytochrome P-450 enzyme in the biosynthetic pathway of ergosterol. Biochemical analysis demonstrates that Erg16p became less susceptible to fluconazole in isolate 13 in a...
متن کاملAmino acid variations of cytochrome P-450 lanosterol 14 alpha-demethylase (CYP51A1) from fluconazoleresistant clinical isolates of Candida albicans.
We studied six clinical isolates of Candida albicans. All six isolates showed high level resistance to fluconazole (minimum inhibitory concentrations 64 microg/ml) with varying degrees of cross-resistance to other azoles but not to amphotericin B. Neither higher dosage nor upregulation of the gene encoding the cytochrome P- 450 lanosterol 14 alpha-demethylase (CYP51A1 or P-450LDM) was responsib...
متن کاملContribution of clinically derived mutations in ERG11 to azole resistance in Candida albicans.
In Candida albicans, the ERG11 gene encodes lanosterol demethylase, the target of the azole antifungals. Mutations in ERG11 that result in an amino acid substitution alter the abilities of the azoles to bind to and inhibit Erg11, resulting in resistance. Although ERG11 mutations have been observed in clinical isolates, the specific contributions of individual ERG11 mutations to azole resistance...
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ژورنال
عنوان ژورنال: Medical Mycology Journal
سال: 2017
ISSN: 2185-6486,2186-165X
DOI: 10.3314/mmj.16-00027